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Neighbour-joining tree of coronaviruses based on full genomic sequences. The tree was inferred using mega4. Bootstrap support values >95 % are indicated. Previously defined genera and species and a potential new species (Alphacoronavirus 2) are delineated by the bars on the right. The naming of these genera is as described in the 2009 report of the ICTV. Bar, number of nucleotide substitutions per site. TCoV, Turkey coronavirus; see text and tables for other abbreviations.
